Name:C.I.Direct Orange 74,C.I.28255
Molecular Structure: Double azo class
Molecular Weight: 975,87
CAS Registry Number:6104-56-9
Manufacturing Methods : 7-Aminonaphthalene-1,3-disulfonic acid diazo, and a coupling m-Toluidine condensation, and then will the nitro reductive into amino, its product to diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: red light orange. Soluble in water for orange brown, slightly soluble in ethanol is palm light orange. The strong sulfuric acid for blue-ray in red, for orange brown after diluted. The dye solution to join strong hydrochloric acid have dark brown precipitation; Add thick nitrogen oxidation sodium solution have orange brown precipitation. Used for cellulose fiber dyeing, Exhaust dyeing and levelness are good.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Pontamine Diazo Orange 2R( Classic Dyestuffs Inc )